There are 2 ways to access an existing org:

1. Get a member or admin of the org to invite you: They have to go to their “Contacts” tab and click on “Add Contacts”

   

2. From a Unifize email notification. If someone adds you to a record/conversation on Unifize, you will probably get an email notification. Click on the main button on the email, and you will end up in a conversational space that looks like this:

Click on the blue button on the left pane. It will say “Create an account” or “Log in”